3			4			7
	4	7
					6	2
		1		8
			1		8
	7	4
					3	6
5			6			4

Difficulty: Super easy (0)

7	3				6
			4
		4					5
5	8
						2	7
1					8
				5
		1				8	2

Difficulty: Easy (0)

			2			8
1
5			6	7	2
	2				1
		6				2
		4	1	6			3
							4
	7			5

Difficulty: Easy (0)

				3		1
							8
		5	1
2				4
			2				5
				2	6
8
	4		5

Difficulty: Very easy (0)